package com.xiaohe.springcloud.controller;

import com.xiaohe.springcloud.entities.CommonResult;
import com.xiaohe.springcloud.entities.Payment;
import com.xiaohe.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * 功能描述
 *
 * @author 和振斌
 * @date 2021/1/11
 * @return
 */
@RestController
@Slf4j
public class OrderController {

    //public static final String PAYMENT_URL="http://localhost:8001";
    public static final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";
    @Resource
    RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
       return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else{
            return new CommonResult<>(444,"出错了");
        }
    }
    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances ==null || instances.size()<=0){
            return null;
        }
        ServiceInstance serviceInstance=loadBalancer.instance(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

    /**
     * 链路跟踪 zipkin+sleuth
     * http://localhost/consumer/payment/zipkin
     *
     * @return
     */
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin() {
        return restTemplate.getForObject("http://localhost:8001/payment/zipkin/", String.class);
    }
 }
